e is supposed to be mdma. i say "supposed" to be because alot of pills are dirty, meaning there is other stuff in it or not even mdma at all. sometime even deadly stuff like pma. anyways, rolling on pure e should last 4-6 hours. however, even if it is pure e depending on the dosage and depending on the person it can have different affects. you should check out ecstasy.org or dancesafe.org. educate yourself. hope this helps... it's wednesday... half way through the week... another half to go...